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How many moles of NaOH must be removed from one litre of its aqueous solution to change its pH from 12 to 11?
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How many moles of NaOH must be removed from one litre of its aqueous s...
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How many moles of NaOH must be removed from one litre of its aqueous s...
The OH- ion concentration =0.01N. So the weight of 
NaOH
 present in 
1 liter
 of 0.001 N 
solution
 =0.001 x 40 = 0.04 gm. So the weight of 
NaOH
 that 
is to be removed
 from the 
solution
 of 
pH
=
12
, is (0.4–0.04)=0.36 gm.

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How many moles of NaOH must be removed from one litre of its aqueous solution to change its pH from 12 to 11?
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